upon158

I have a 58 88 with a 371 that needs alot of help I have a 394 out of a 64 what do I have to do to make it work any help will be greatly appreciated

oldcutlass

Welcome to the site, I moved your post to get a better response. Hopefully someone familiar with your model will chime in soon. In the meantime post a proper intro in the newbie section. We do like pictures.

Charlie Jones

Use the 371 flywheel , lower flywheel housing , and starter . You may have to grind the inside of the upper flywheel housing on the block a little for flywheel clearance .
use the 394 motor and trans mounts . If your lucky they will bolt to the frame . If not you may have to drill some new holes . You may have to modify the accelerator linkage and the linkage from trans to carb . The 58 carb may be the better choice here .
The exhaust pipes will have to be fabricated , a local muffler shop with a pipe bender should be able to handle this. Make sure you have clearance for the fan, the 64 fan sits lower. Fabricate a generator bracket or change your wiring over to use an allternator, your choice. If you have vacuum wipers , you may have to change over to electric.

upon158

I have the whole 64 car should I just use that transmission or the one in the 58.will the intake off the 371 fit the 394

Tedd Thompson

I wouldn't use a slim Jim if I could get the jetaway to bolt up, Slim Jim's are notorious for being problematic. You may need to re drill for a larger pilot bearing if it's not already done. The 371 intake wont fit because of the higher deck height of the 394, makes it to wide for the ports to line up on the intake.So use what you have on the 394 top and adjust the linkage to fit the difference in deck height.... Tedd.

rocketraider

63-64 394 front mounts are a little different than 49-62 Rockets. Not sure what you might get into there. I don't know for sure if the 58 371 front cover and water pump will transfer to a 63-64 block either, but it if will that will make your job simpler. It'll also make it easier to find a water pump down the road.

upon158

Thank u guys for all your help after more homework I think I'm gonna fix the 371 anyone have a cam and lifters

redoldsman

Call Tony at Ross Racing for a cam and lifters. He knows his stuff on these first generation Olds engines. He learned from his Dad.

Tedd Thompson

Here is a link, good Old's people here...Tedd https://rossracingengines.oursafeserver.com/

upon158

Motor is back together tony is a great guy thank u ended up needing a head cam lifters rings and timing chain

oldcutlass

Glad your moving in the right direction.